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Finding the Fourth Proportional to 28,104.64, 38,785.64 and 16,171.92

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Solution

The fourth proportional to 28,104.64, 38,785.64 and 16,171.92 is: 22,317.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,104.64 : 38,785.64 = 16,171.92 : x
  2. Step 2: Convert to fraction form
    28,104.64/38,785.64 = 16,171.92/x
  3. Step 3: Cross multiply
    28,104.64x = 38,785.64 × 16,171.92
  4. Step 4: Simplify right side
    28,104.64x = 627,238,186.37
  5. Step 5: Solve for x
    x = 627,238,186.37/28,104.64
  6. Step 6: Final answer
    x = 22,317.96

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.